JPS56141959A - Casting pressure control device for low-pressure casting machine - Google Patents

Casting pressure control device for low-pressure casting machine

Info

Publication number
JPS56141959A
JPS56141959A JP4520680A JP4520680A JPS56141959A JP S56141959 A JPS56141959 A JP S56141959A JP 4520680 A JP4520680 A JP 4520680A JP 4520680 A JP4520680 A JP 4520680A JP S56141959 A JPS56141959 A JP S56141959A
Authority
JP
Japan
Prior art keywords
pressure
molten metal
furnace
signal
stalk
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP4520680A
Other languages
Japanese (ja)
Other versions
JPH0214144B2 (en
Inventor
Mitsuo Koide
Norio Iwama
Kazuo Nomura
Masayoshi Inomata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Toyota Central R&D Labs Inc
Original Assignee
Toyota Motor Corp
Toyota Central R&D Labs Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp, Toyota Central R&D Labs Inc filed Critical Toyota Motor Corp
Priority to JP4520680A priority Critical patent/JPS56141959A/en
Publication of JPS56141959A publication Critical patent/JPS56141959A/en
Publication of JPH0214144B2 publication Critical patent/JPH0214144B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To provide always homogenous cast products by setting the final target pressure at the pressure at the arrival of the molten metal at the predetermined point where the sectional area from a stalk until filling into a metal mold changes sharply plus the pressure component required for completion of filling into the metallic mold from this predetermined point and head pressure component.
CONSTITUTION: The pouring pressure control device of this low-pressure casting machine operates like this: The space in the upper part of the molten metal in a heat insulating furnace 1 which is tightly sealed and in which the molten metal 2 is stored is pressurized by air, and molten metal 2 is conducted from the stalk erected in the molten metal in the furnace 1 into a metal mold 4, after which the pressurizing is retained and the molten metal 2 is allowed to solidify. During this time, the arrival of the molten metal 2 at the predetermined point where the sectional area changes sharply while it is being filled from the stalk 3 into the metallic mold 4 is detected by the pneumatic pressure measuring means 8 in the furnace 1 and by discriminating the inflection point of the pressure signal from this means 8. Thence, according to the signal from this detection signal, the final target pressure is set in a signal processing circuit 13 and according to the control signal from this circuit 13, the pneumatic pressure to be supplied to the furnace 1 is controlled 6 until the target pressure is reached, whereby the pressure is set and controlled to the optimum final target pressure according to the molten metal amount in the furnace 1.
COPYRIGHT: (C)1981,JPO&Japio
JP4520680A 1980-04-08 1980-04-08 Casting pressure control device for low-pressure casting machine Granted JPS56141959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4520680A JPS56141959A (en) 1980-04-08 1980-04-08 Casting pressure control device for low-pressure casting machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4520680A JPS56141959A (en) 1980-04-08 1980-04-08 Casting pressure control device for low-pressure casting machine

Publications (2)

Publication Number Publication Date
JPS56141959A true JPS56141959A (en) 1981-11-05
JPH0214144B2 JPH0214144B2 (en) 1990-04-06

Family

ID=12712787

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4520680A Granted JPS56141959A (en) 1980-04-08 1980-04-08 Casting pressure control device for low-pressure casting machine

Country Status (1)

Country Link
JP (1) JPS56141959A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63290674A (en) * 1987-05-21 1988-11-28 Aichi Mach Ind Co Ltd Pressure raising device for low pressure casting machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5030738A (en) * 1973-05-12 1975-03-27

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5030738A (en) * 1973-05-12 1975-03-27

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63290674A (en) * 1987-05-21 1988-11-28 Aichi Mach Ind Co Ltd Pressure raising device for low pressure casting machine
JPH0426936B2 (en) * 1987-05-21 1992-05-08 Aichi Machine Ind

Also Published As

Publication number Publication date
JPH0214144B2 (en) 1990-04-06

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